And just one kind of food from a single country which is only 4.2% of the world's population. That makes beef more than 50% of our "fair share" of emissions.

Isn't it incredible that if we all stopped eating beef then this would have a larger impact on global warming than if we rolled back to a preindustrial age and got rid of trains, airplanes, automobiles, and the construction industry?

How do you figure?

The wording is vague. It’s also possible read as 2.4% of total US emissions, not worldwide. Looking up other sources, it does seem to be 2-3% of total US emissions, not worldwide.

US beef is about 21% of all beef. A lot is exported. Fwiw